i did one with leftovers from a bunch of grains and hops i had. http://www.homebrewtalk.com/f12/ever...pa-help-87018/
honestly at first it was really bad, the malt wasn't in ballance with the hops and it just had this funky taste to it. After about a month and a half if not longer everything melded and its quite good. I used the carafa to cap the mash with when i sparged to add color but i didint use enough and it turned out very dark but not black. Its very enjoyable at this point though but it did take a few months

I had one from Tied House in San Jose which was horrible. It tasted like a burnt stout with a bitter kick at the end, not very subtle at all.

I believe Stone makes one called Subliminally Self Righteous. I had this at a double IPA festival. It was my first experience with a black IPA and was very surprised to have a beer look like a stout/porter, but taste like a double IPA.

My guess would be to add some BP or dark Crystal Malt to your IPA recipe to give it some color.